Super Duplex Bolts are made up of different duplex steel materials. The super duplex is a material grade with 25% chromium, 4% molybdenum and 7% nickel. Suraj Metal Corporationis a leading manufacturer and supplier of the different UNS S32750 Super Duplex 2507 Fasteners in various types, grades and specifications. These fasteners are strong and very much corrosion resistant.
The Super Duplex 2507 Bolts have very high resistance to pitting, corrosion, corrosion fatigue and crevice corrosion. The products also have high chloride ion stress cracking resistance. The UNS S32760 Alloy 2507 Nuts and Bolts are also resistant to general corrosive acids. The material has very high mechanical strength. The minimum yield strength of this super duplex grade is 82ksi and the minimum tensile strength is 125ksi. The Super Duplex Screws are used in high stress applications such as process and services water systems, ballast water systems and in water desalination plants. The Stainless Steel Washers can withstand high mechanical stress and loads. The material can perform better in marine and sea water environments. The Super Duplex Threaded Rod and other types of super duplex fasteners are used in flue gas desulfurization systems and oil and gas exploration systems. Please feel free to contact us for more information on the UNS S32760 Fg Stud Bolts and pricing.
| Standard | DIN, ASTM, BS and all International Standards |
| Specifications | ASTM A479 & ASME SA479 |
| UNS S32760 Nut and Bolts Size | M3 To M56 3/6" to 2" |
| Length | 3 to 200 MM |
| Super Duplex Steel 2207 Machine Screws Size | M1.6 To M12 |
| Duplex Steel 2205 Washers Size | M3 To M56 3/6" to 2" |
| Element | Content (%) |
|---|---|
| Chromium, Cr | 24 – 26 |
| Nickel, Ni | 6 – 8 |
| Molybdenum, Mo | 3 – 5 |
| Manganese, Mn | 1.20 max |
| Silicon, Si | 0.80 max |
| Copper, Cu | 0.50 max |
| Nitrogen, N | 0.24 – 0.32 |
| Phosphorous, P | 0.035 max |
| Carbon, C | 0.030 max |
| Sulfur, S | 0.020 max |
| Iron, Fe | Balance |
| Grade | Tensile Strength (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) |
Hardness Rockwell C (HR C) |
|---|---|---|---|---|
| UNS-S 32750 | 795 | 550 | 15 | 32max |
| Alloy | Common Name | Related Specification | ||
|---|---|---|---|---|
| European | UNS | ASTM/ASME | ||
| Alloy 2507 | SAF 2507 ® | 1.4410 | UNS S32750 | A479 / SA479 / F53 |
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm3 | 0.281 lb/in3 |
| Melting point | 1350°C | 2460°F |
| Nut Size (mm) |
Diameter* (mm) |
Height (mm) |
||
|---|---|---|---|---|
| Hex Nut | Jam Nut | Nylock Nut | ||
| 2 | 4 | 1.6 | 1.2 | - |
| 2.5 | 5 | 2 | 1.6 | - |
| 3 | 5.5 | 2.4 | 1.8 | 4 |
| 4 | 7 | 3.2 | 2.2 | 5 |
| 5 | 8 | 4 | 2.7 | 5 |
| 6 | 10 | 5 | 3.2 | 6 |
| 7 | 11 | 5.5 | 3.5 | - |
| 8 | 13 | 6.5 | 4 | 8 |
| 10 | 17 | 8 | 5 | 10 |
| 12 | 19 | 10 | 6 | 12 |
| 14 | 22 | 11 | 7 | 14 |
| 16 | 24 | 13 | 8 | 16 |
| 18 | 27 | 15 | 9 | 18.5 |
| 20 | 30 | 16 | 10 | 20 |